Core chuck for mounting paper rolls on collators or printing presses



March 17, 1970 E. M. ASSONY 3 501,107

CORE CHUCK FOR MOUNTING PAPER R S ON COLLATORS OR FRI N RES J Filed y 1968 INVENTOR. [ammo M. Assouk United States Patent ABSTRACT OF THE DISCLOSURE" A chuck for securing rolls ofpaper on a collating machineor web-fed printing press. The chuck is slidable on a rotatable spindle onto which the roll of paper mounted and has, in addition to automatically set but quickly releasable means for clamping it against axial movement on the spindle, a wedge means which is adapted to be jammed under or into the end of the pulp or paperboard tube on which the paper is wound, so as to secure the chuck and paper roll against rotation. The chuck is also-keyed or splined onto the spindle, so as to securethe chuck against rotation relative to the spindle.

FIELD OF THE IN ENTI N This invention relates to chucks for releasably securing rolls of paper on the rotating spindle of a collator or printing machine. I

BACKGROUND OF THE INVENTION Rolls of paper used in the printing industry'on'collators and web-fed presses are mounted on coarse, fibrous or paperboard tubes, known as cores, and these, with rolls of paper thereon, are slipped over and fixed to rotatable spindles. Devices for accomplishing this in the past have typically involved a body mounted pin to be driven into the core, with set screws or clamps for clamping to the spindle.

It is a general purpose of the invention toprovide an ROLLS ON improved means for locking the core to the spindle, re-

quiring no tools, and set automatically by merely'ramming it, by hand, against the core.

SUMMARY OF THE INVENTION The invention provides, in an illustrative embodiment, a chuck slidable into the spindle after the paper roll, and equipped with a pivoted wedge-shaped key which rides in a keyway in the spindle, and is engageable under or inside the core, like a wedge. It thus penetrates and becomes partially embedded into the underside of the core. The device also uses a clamp of a type known previously in other environments. This clamp, embodied in the combination of the present invention, locks to the spindle automatically when the pivoted wedge of the device has been rammed home against and into the core, but is releasable with easy finger pressure for removal.

DESCRIPTION OF THE DRAWINGS An illustrative embodiment of the invention is shown in the accompanying drawings, in which:

FIG. 1 is a side elevation, with parts broken away, of a core chuck in accordance with the invention;

FIG. 2 is a section on line 22 of FIG. 1; and

FIG. 3 is a section on line 33 of FIG. 1.

DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT In the drawings, a roll of paper 10 is wound on a fibrous or paperboard tube or core 11, and the latter is shown mounted on a rotatable machine spindle 12 under- 3,501,107 Patented Mar. 17, 1970 stood to be supported for rotation on its axis on suitable bearings, not shown.

At 13 is designated the chuck of the invention, the shaft clamping means being designated at 14, and the means for engaging the core 11 being designated at 15.

Clamping means 14 involves clamping elements of a type previously known per se in two-jaw clamps, and no claim is made thereto excepting in combination with the improvements of the present invention.

The paper roll 10 and core 11 are slipped onto collator or printer spindle 16, flush against a stop flange 17, and a round housing 18 is slipped onto the spindle after the paper roll. This housing has spaced end walls 20 and 21 and a peripheral wall 22. Walls 20 and 21 are axially bored for easy sliding movement on spindle 16. Front wall 20 is notched at 24 to receive the rearward or pivoted end of a wedge or wedge-shaped key 25, and the latter drops into and slides along a keyway 26 in spindle 16. The key 25 is pivoted on roll pin 27 mounted in wall 20 and extending across the keyway 26. As shown, the wedge 25 has a long edge 30 which, when the wedge is down in the keyway, makes a relatively sharp acute angle, say typically of approximately 15, with the axis of the spindle.

To lock the core 11 to the spindle, against rotation and axial translation, the housing is simply manually rammed against the paper roll and core. The point of the wedgeshaped key moves under the core, and the key then mashes up into the deformable fibrous or paperboard core until the housing wall 20 engages the core and the paper roll, i.e., to the locked position shown in FIG. 1. The key actually forms a wedge-shaped or triangular notch in the inside of the core tube, at the end thereof, and occupies a position in this not-ch, as well as within the keyway of the spindle. Thus, the paper roll and core are keyed against rotation on the spindle, and also wedged against axial movement on the spindle. The wedge 15 is at the same time locked automatically in its position of deepest penetration into or beneath the core by the automatically set clamp means 14. Any clamp means capable of carrying out this function may be used, but that here shown, and now to be described, has proved very successful in practice.

The housing wall 22 is notched at the top, as at 40, and the wall 41 of this notch is rounded slightly and functions as a fulcrum for a plurality of flat clutch plates 42, which are placed face to face, and disposed normally in the angular position of FIG. 1, but may be rocked to a position more at right angles to the spindle. These plates 42 comprise ring portions 45 which surround the spindle 16 with a small clearance, and which have, extending from diametrically opposite portions thereof, radial tabs 46 and 47. The tabs 46 need be only long enough to have fulcrum bearing on the wall or abutment 41. The diametrically opposite tabs 47 project through a housing notch 48, where they may be reached by the fingers of the operator and moved from the canted position shown toward a more normal position, rocking at this time on fulcrum or abutment 41.

Enclosed within the housing 18, to the right of the clutch plates 45, as seen in FIG. 1, is a two-turn coil compression spring 50, the two ends of which are spaced to form a gap 51, as seen best in FIG. 2. These spring ends oppose lug 52, formed integrally with the housing end 21 and the wall 22. This lug serves to key the spring against relative rotation in the housing. The spring is formed so that the two turns thereof are normally adjacent one another at the top, as viewed in FIG. 1, but spaced from one another at the bottom, so that one turn lies fiat against the inside surface of the end wall 21 while the other turn presses yieldingly against the clutch plates 42 below the spindle 16 (FIG. 1).

With the parts in the clamped position of FIG. 1,

the clutch plates are fulcrumed at 41, near the tops thereof, and are pressed forwardly below the spindle 16 by the spring 50. Thus, they are spring-urged into a canted position, causing them to bind on the spindle 16. In this position, they are locked against axial movement on the spindle. To release the locks, the tabs 47 at the bottom are simply engaged by the fingers and pulled toward the right. As the clutch plates are rocked against the spring 50 toward a more normal position, they become released from the spindle, and the entire core chuck may be readily pulled off the spindle 16 by simply continuing the finger pressure against the tabs 47. This operation, it Will be seen, involves pulling or releasing the key 15 from the core, unclamping the clutch plates from the spindle, and then sliding the housing 18 axially off the spindle, all in one movement.

Note particularly that the clutch plates of the clamping means have a desirable and unique action in that they set and lock automatically at the exact point of deepest penetration of the wedge under or into the core as the device is rammed against the core tube and paper roll, leaving no opportunity for looseness to occur in the course of an after-operation consisting in fastening the housing to the spindle by other means.

Note also that a single action, namely pulling towards the right on tabs 47, disengages the wedge or key 25 from the core tube, unclamps the clamping means 14, and pulls the entire device off the spindle. Time and motion are thus conserved to the utmost. Since a collator may have as many as twelve paper rolls, these savings are quite important.

It will be understood that the drawings and description are for illustrative purposes only, and that various changes in design, structure, and arrangement may be made therein. 1 claim: 1. A chuck for securing the cylindrical, deformable core of a paper roll onto a spindle that comprises:

a cylindrically bored housing slidable on said spindle towards a core and paper roll thereon, there being a longitudinal keyway in said spindle, and

a key pivotally mounted on said housing on an axis transversely of said keyway and projecting from said housing in the direction of said core and paper roll, said key riding in said keyway, and having a forwardly tapered wedge portion engageable inside said core, said key engaging the bottom of said keyway and said forwardly tapered wedge portion having a longitudinal edge which is inclined at a relatively sharp acute angle to said spindle, and which is engageable with and penetrable within the inside of the corresponding end portion of said core, and

clamp means for releasably clamping said housing to said spindle. 2. The subject matter of claim 1, wherein said key is pivotally mounted on said housing on an axis outside and transversely of said keyway.

3. The subject matter of claim 1, including quick releasable means for automatically locking said housing to said spindle at the point at which said key reaches its final depth of penetration into said core.

4. The subject matter of claim 1, wherein said clamp means comprises a clutch plate having a fulcrum in said housing, a bore therethrough receiving said spindle with clearance, and spring means seated on said housing urging said plate to a canted position in which it grips the spindle.

5. A chuck for securing the cylindrical, deformable core of a paper roll onto a spindle that comprises:

a cylindrically bored housing slidable on said spindle towards a core and paper roll thereon, there bein a longitiudinal keyway in said spindle,

a key pivotally mounted on said housing on an axis transversely of said keyway and projecting from said housing in the direction of said core and paper roll, said key riding in said keyway, and having a forward indenting portion projecting from said keyway adapted for engagement with and indentation into said deformable core upon movement of said housing and key towards engagement with said paper roll and core, and

clamp means for releasably clamping said housing to said spindle.

References Cited UNITED STATES PATENTS NATHAN L. MINTZ, Primary Examiner 

